ArticleProceedings of the National Academy of Sciences of the United States of America2015
Environmental CO2 inhibits Caenorhabditis elegans egg-laying by modulating olfactory neurons and evokes widespread changes in neural activity.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.
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37 citing papers in PubMed, 62 citations in OpenAlex.
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- Carbon dioxide shapes parasite-host interactions in a human-infective nematode.Current biology : CB · 2025Article
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- Semantic representation of neural circuit knowledge in Caenorhabditis elegans.Brain informatics · 2023Article
- A single neuron in C. elegans orchestrates multiple motor outputs through parallel modes of transmission.Current biology : CB · 2023Article
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- Changes in lipid metabolism driven by steroid signalling modulate proteostasis in C. elegans.EMBO reports · 2023Article
- Muscle-directed mechanosensory feedback activates egg-laying circuit activity and behavior in Caenorhabditis elegans.Current biology : CB · 2023Article
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- Deep learning for robust and flexible tracking in behavioral studies for C. elegans.PLoS computational biology · 2022Article
- The transcription factor unc-130/FOXD3/4 contributes to the biphasic calcium response required to optimize avoidance behavior.Scientific reports · 2022Article
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2 authors at 1 institution in 1 country.
Funding
Abstract
Carbon dioxide (CO2) gradients are ubiquitous and provide animals with information about their environment, such as the potential presence of prey or predators. The nematode Caenorhabditis elegans avoids elevated CO2, and previous work identified three neuron pairs called "BAG," "AFD," and "ASE" that respond to CO2 stimuli. Using in vivo Ca(2+) imaging and behavioral analysis, we show that C. elegans can detect CO2 independently of these sensory pathways. Many of the C. elegans sensory neurons we examined, including the AWC olfactory neurons, the ASJ and ASK gustatory neurons, and the ASH and ADL nociceptors, respond to a rise in CO2 with a rise in Ca(2+). In contrast, glial sheath cells harboring the sensory endings of C. elegans' major chemosensory neurons exhibit strong and sustained decreases in Ca(2+) in response to high CO2. Some of these CO2 responses appear to be cell intrinsic. Worms therefore may couple detection of CO2 to that of other cues at the earliest stages of sensory processing. We show that C. elegans persistently suppresses oviposition at high CO2. Hermaphrodite-specific neurons (HSNs), the executive neurons driving egg-laying, are tonically inhibited when CO2 is elevated. CO2 modulates the egg-laying system partly through the AWC olfactory neurons: High CO2 tonically activates AWC by a cGMP-dependent mechanism, and AWC output inhibits the HSNs. Our work shows that CO2 is a more complex sensory cue for C. elegans than previously thought, both in terms of behavior and neural circuitry.
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